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Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > 3 gallon carboy too big for 2.5 gallon secondary
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Old 07-24-2011, 02:44 AM   #1
wazzu1991
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Default 3 gallon carboy too big for 2.5 gallon secondary

A relative of mine is giving me a 2.5 gallon keg. I've been brewing 3 gallon batches lately using a 5 gallon carboy for primary and a 3 gallon for a secondary for the beers that I dry hop etc. Is a 3 gallon carboy too large to use as a secondary for a 2.5 gallon batch?


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Old 07-24-2011, 02:54 AM   #2
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Personally I think that sounds just about perfect. You May have bit of extra head space in a 3 gallon carboy, but the transfer should kick up enough yeast/CO2 to coat the beer and prevent oxidation.

Just my 2 cents.


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Old 07-24-2011, 03:18 AM   #3
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Thats what I was hoping. Thanks.
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Old 07-24-2011, 10:02 AM   #4
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But you are transferring your beer onto 3 gallons of air.

I usually purge anything I am transferring in of any air that might have been in there. This is only practical if you have a kegging system, or a bottle of gas sitting around for some reason. Since you are getting a keg, I assume you will be getting gas to push it.
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Old 08-19-2011, 05:04 PM   #5
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I picked up the keg the other day and am going to brew a 2.5 gal chocolate porter to fill it with. I was going to skip the secondary but, since I am adding cocoa nibs and a vanilla bean to guess I will secondary it. To purge the air out of the carboy do I just put the CO2 line into the top of the carboy for a few seconds and let the CO2 run? Should I do it before and after racking it to the carboy?

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Old 08-19-2011, 05:23 PM   #6
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I just racked onto some dry hops for my pale ale. I do three gallon batches myself. I have not had an issue yet. so we will see about this one. I am thinking though about maybe changing and dry hop in the primary, just to see if there would be any difference.
just my two cents.

Happy brewing,

Mike


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